A target generator with a combined graticle belongs to the technical field of parameter measurement of an optical instrument and an optical system. In prior art, defects of adjustment error, eccentricity and inclination cannot be prevented in a vision adjustment process. According to the target generator with the combined graticule, a light source, frosted glass and an object lens are successivelyarranged coaxially. The target generator is characterized in that the combined graticule is fixed in an optical axis between the frosted glass and the object lens; the combined graticule is obtainedthrough coaxially arranging a plurality of graticules; each graticule is arranged at positions which are separated by an object distance x on the object lens; and the object distance x is determined according to a formula x= -f'<2>/x', wherein x is the object distance of the object lens, f' is the image focal length of the object lens, and x' is the image distance of the object lens. One target generator can supply a plurality of objects for debugging an optical instrument.